Biological Trickling Filters For Purification Of Volatile Organic Emissions From Experimental Research

Selecting toluene and xylene as the representative of VOCs, using slag as packing materials, aimed to study the elimination characteristic of biotrickling filter(BTF). The effect of concentration and flux on biodegradation of BTF was investigated. The competitive inhibition of different compounds was explored. The results showed that: At the gas flux of 0.2m3/h; when gas is single, for toluene and xylene, their maximum elimination capacity (EC) is 79.5g/(m3-h) and 47.5g/(m3-h) respectively. When gases are mixed, EC of them are both decreased due to competitive inhibition. Keep concentration invariable, the elimination efficiency was decreased as the gas flux increased. The EC of both compounds reached to maximum when the flux was 0.26m3/h. The optimum residence time is 119s.The observation of biotic community demonstrated that Brevibacterium was dominant. According to basic theories of adsorption-biofilm, mathematical model was set up. The model showed good agreement with the experimental results.